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Remember solutions?

Explore the concepts of solutions, solutes, and solvents in chemistry alongside passive transport mechanisms in cells, including diffusion and osmosis. Understand the roles of glycerol, fatty acids, and phospholipid bilayers in cell membranes.

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Remember solutions?

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  1. Remember solutions?

  2. solutions Solutions have 2 parts solutes – particles that dissolve in solvent solvent – liquid in which solutes dissolve Ex: solvent: water solute: Kool-Aid solvent: water solute: Tea, Coffee

  3. solutions Solutions can have different concentrations, [ ] Solutions can be SATURATED * solvent cannot hold any more solute * if added, more solute will fall out of solution

  4. The primary component of the cell membrane

  5. Glycerol Fatty acids

  6. Glycerol Hydrophilic Fatty acids

  7. Glycerol Hydrophilic – love water Fatty acids Hydrophobic – fear water

  8. Phospholipidbilayer Outside cell: water & blood Inside cell: cytoplasm (water)

  9. I. Passive transport • Requires NO cell E • Particles pass through the CM w/their own kinetic E (bouncing/knocking each other through)

  10. A. (Simple) Diffusion • Movement of small, uncharged particles • O2, CO2 • Moving through phospholipidbilayer • From an area of [high] to [low] to reach equilibrium

  11. [Hi] This represents a [ ] gradient [Lo]

  12. [Hi] What will happen? [Lo]

  13. [Hi] Is it finished? [Lo]

  14. NO!

  15. [equilibrium]

  16. Moving down the gradient

  17. Moving down the gradient

  18. Fold paper in half: top to bottom and side-to-side

  19. Passive transport

  20. Passive transport O2 O2 O2 O2 Diffusion

  21. Passive transport O2 O2 O2 O2 Diffusion

  22. Passive transport CO2 CO2 CO2CO2 Diffusion

  23. Passive transport CO2 CO2 CO2 CO2 Diffusion

  24. B. Facilitated (aided/helped) Diffusion • Movement of small particles that have a charge or are slightly larger than O2, CO2 Ex: glucose, water • Move through specific protein channel/carrier • From an area of [high] to [low] to reach equilibrium

  25. Cell membrane: Proteins • Embedded PROTEINS

  26. Passive transport Carrier protein/ protein channel

  27. Passive transport Facilitated diffusion Osmosis

  28. Passive transport Facilitated diffusion Osmosis

  29. C. Osmosis (a form of facilitated diffusion) • Movement of water • Moving through special protein channel, aquaporin • From an area of [high] of water to [low] of water to reach equilibrium

  30. Passive transport H2O Aquaporin Facilitated diffusion & Osmosis

  31. In what direction will water move?

  32. comparing a cell to surrounding solution environment cell

  33. comparing a cell to surrounding solution H2O H2O H2O H2O H2O H2O

  34. This is how cells are affected Lyse Normal Plasmolyzed Turgid/turgor pressure

  35. osmosis

  36. Osmosis lab…

  37. PASSIVE TRANSPORT • DIFFUSION diffusion vid

  38. osmosis • osmosis vid

  39. Cell membrane Remind you of anything?

  40. PASSIVE TRANSPORT • DIFFUSION some particles (CO2, O2),will diffuse straight through the lipid bilayer

  41. PASSIVE TRANSPORT • DIFFUSION other particles (ex: glucose) will have to pass through the protein channels

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